Wauwatosa, WI Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Corner lot coverage, GR
- 35%
- Corner lot coverage, SR/NR/MR
- 42%
- Corner lot coverage, LDM/MDM
- 60% / 70%
- Interior lot coverage, GR
- 35%
- Interior lot coverage, LDM/MDM
- 40% / 60%
- Accessory building coverage cap
- 12% of lot area
- ADU coverage cap
- excluded (n/a)
Summary
Wauwatosa limits how much of a residential lot buildings may cover under Municipal Code Section 24.02.030. Combined principal and accessory coverage on a corner lot ranges from 35% in Garden Residential up to 70% in Medium-Density Multi-unit, and interior-lot caps run lower, from 35% to 60%. Accessory buildings alone are capped at 12% of lot area, but accessory dwelling units are excluded from that cap.
Max. Building Coverage (% of lot area) All principal and accessory buildings combined Corner lot 35 42 42 42 60 70 Interior lot 35 37 37 37 40 60 Accessory buildings[4] 12 12 12 12 12 12 Accessory dwelling units [4] n/a n/a n/a n/a n/a n/a ... [4] Accessory Dwelling Units (ADUs) are not included in accessory building lot coverage limits. Size and dimensional standards for ADUs are provided in Section 24.10.075.
Full Breakdown
030, Lot And Building Regulations, sets a Maximum Building Coverage percentage, covering all principal and accessory buildings combined, that differs by district and by whether the lot is a corner lot or an interior lot. On a corner lot the cap is 35% in Garden Residential, 42% in Suburban Residential, Neighborhood Residential and Mixed Residential, 60% in Low-Density Multi-unit Residential and 70% in Medium-Density Multi-unit Residential. On an interior lot the cap is lower in most districts: 35% in Garden Residential, 37% in Suburban, Neighborhood and Mixed Residential, 40% in Low-Density Multi-unit and 60% in Medium-Density Multi-unit.
Separate from those combined totals, accessory buildings alone are capped at 12% of lot area in every one of the six residential districts. 075. 02 dimensional table, were adopted in their current form when Wauwatosa repealed and replaced its zoning ordinance by Ord. O-25-25 on November 18, 2025, and the code cautions that meeting the coverage percentage does not guarantee a lot can achieve maximum density, since floodplain, parking, landscaping and other standards can further limit what a parcel can hold.
Violations & Fines
Exceeding the maximum building coverage percentage set for a lot's district and lot type is a zoning violation enforced under Section 24.17.020: the zoning administrator can withhold or revoke building permits, issue a stop-work order, and the city may seek injunctive relief or abatement in court. Notice starts a 10-day cure period for non-emergency violations, and each additional day of noncompliance after that is a separate offense under Chapter 1.12's general penalty provision.
Frequently Asked Questions
How much of my lot can I cover with buildings in Wauwatosa?
Is the lot coverage limit different for interior lots?
Does an accessory dwelling unit count against my lot coverage?
Sources & Official References
Other rules in Wauwatosa
Compare Wauwatosa to another location·View the Wisconsin building setbacks & zoning overview
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Lot Coverage Limits in Nearby Cities
How other cities in Milwaukee County handle lot coverage limits.